25018417 has 2 divisors, whose sum is σ = 25018418. Its totient is φ = 25018416.

The previous prime is 25018393. The next prime is 25018423. The reversal of 25018417 is 71481052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24245776 + 772641 = 4924^2 + 879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25018417 is a prime.

It is equal to p_1567045 and since 25018417 and 1567045 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (25018447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12509208 + 12509209.

It is an arithmetic number, because the mean of its divisors is an integer number (12509209).

Almost surely, 2^25018417 is an apocalyptic number.

It is an amenable number.

25018417 is a deficient number, since it is larger than the sum of its proper divisors (1).

25018417 is an equidigital number, since it uses as much as digits as its factorization.

25018417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 25018417 is about 5001.8413609390. The cubic root of 25018417 is about 292.4735583763.

Adding to 25018417 its reverse (71481052), we get a palindrome (96499469).

The spelling of 25018417 in words is "twenty-five million, eighteen thousand, four hundred seventeen".